#!/bin/bash

emu=$(cat nowcoder.txt | cut -d ':' -f 1 | sort | uniq)
for i in $emu;do
    echo "[$i]"
    while read line;do
        col1=$(echo $line | cut -d ':' -f 1)
        col2=$(echo $line | cut -d ':' -f 2)
        if [ $i == $col1 ];then
            echo $col2 
        fi
    done < nowcoder.txt
done